GOOD MANUFACTURING PRACTICE GUIDE PART I FOR MEDICAL GASES

Transcription

1 M E D I C A L G A S E S GOOD MANUFACTURING PRACTICE GUIDE PART I FOR MEDICAL GASES Doc 99/15/Part 1 Revision of Doc 99/03 EUROPEAN INDUSTRIAL GASES ASSOCIATION AISBL AVENUE DES ARTS 3-5 B 1210 BRUSSELS Tel: Fax: info@eiga.eu Internet:

2 Doc 99/15/Part 1 GOOD MANUFACTURING PRACTICE GUIDE PART I FOR MEDICINAL GASES Prepared by WG-7 Disclaimer All technical publications of EIGA or under EIGA's name, including Codes of practice, Safety procedures and any other technical information contained in such publications were obtained from sources believed to be reliable and are based on technical information and experience currently available from members of EIGA and others at the date of their issuance. While EIGA recommends reference to or use of its publications by its members, such reference to or use of EIGA's publications by its members or third parties are purely voluntary and not binding. Therefore, EIGA or its members make no guarantee of the results and assume no liability or responsibility in connection with the reference to or use of information or suggestions contained in EIGA's publications. EIGA has no control whatsoever as regards, performance or non performance, misinterpretation, proper or improper use of any information or suggestions contained in EIGA's publications by any person or entity (including EIGA members) and EIGA expressly disclaims any liability in connection thereto. EIGA's publications are subject to periodic review and users are cautioned to obtain the latest edition. EIGA EIGA grants permission to reproduce this publication provided the Association is acknowledged as the source EUROPEAN INDUSTRIAL GASES ASSOCIATION AISBL Avenue des Arts 3-5 B 1210 Brussels Tel Fax info@eiga.eu

3 Table of Contents 1 Introduction Scope and purpose Scope Purpose Definitions Quality Management (EC GMP Chapter 1) Principle Quality assurance (QA) Good Manufacturing Practice (GMP) for medicinal gases Quality control (QC) Product quality review Quality risk management Personnel (EC GMP Chapter 2) Principle General Key personnel Training Protective clothing Personal hygiene Premises and equipment (EC GMP Guide Chapter 3) Principle Premises Manufacturing areas - Production Manufacturing areas - Cylinder filling Quality control areas Ancillary areas Equipment Equipment - Bulk production Equipment - Medicinal cylinder filling Equipment - Bulk storage and transport Documentation (EC GMP Chapter 4) Principles General Specifications Procedures and work instructions Batch records Other records Records Production (EC GMP Chapter 5) Principles General Validation Starting materials Production - Bulk medicinal gases Production - Medicinal gas cylinder filling Equipment cleaning Packaging materials - Medicinal gas cylinder filling Finished products - Cylinders Rejected products Quality control (EC GMP Chapter 6) Principles... 37

4 9.2 General Sampling Bulk production Cylinder filling Testing Contract management and analysis (EC GMP Chapter 7) Principle General Contract giver Contract acceptor The contract Complaint and product recall (EC GMP Chapter 8) Principle Complaints Recalls Self-inspection (EC GMP Chapter 9) Principle Self-inspection audits Self-inspection reports References Amendments to 99/03 Section Change Rewrite to reflect current GMP and alignment to EIGA style manual

5 1 Introduction Directive 2001/83/EC of the European Parliament and of the council of 6 November 2001 on the community code relating to medicinal products for human use [1] 1 and as amended by Directive 2004/27/EC of the European Parliament and the Council of 31 March 2004 [2] defines a medicinal product as any substance or combination of substances: presented for treating or preventing disease in human beings; and which may be administered to human beings with a view to making a medical diagnosis or to restoring, correcting or modifying physiological functions in human beings. This Directive requires that the manufacture of all medicinal products shall be controlled following the principles of Good Manufacturing Practice (GMP), detailed in the EC Good Manufacturing Practice Guide and defined in Commission Directive 2003/94 of 8 October 2003 laying down the principles and guidelines of good manufacturing practice in respect of medicinal products for human use and investigational medicinal products for human use [3]. The EC GMP Guide details the principles of the quality management system (QMS) that should be established by every manufacturer or importer of medicinal products and is laid out in nine chapters, dealing with each aspect of the QMS. The purpose of the EC GMP Guide is to ensure that the manufacturing process is controlled so that the medicinal products are produced to the quality level specified in the appropriate marketing authorisation, where required, or the product specification. The EC GMP Guide recognises the differences between the manufacture of traditional pharmaceutical products and medicinal gases and prescribes in Annex 6 of the Guide the specific elements of the QMS to be used to control the manufacture of medicinal gases. The requirements of Annex 6 have to be followed in addition to those of the main EC GMP Guide. To assist the Medical Gas Industry in the interpretation of the overall requirements of the EC legislation with respect to GMP, this EIGA GMP Guide has been prepared. It has been structured so that it integrates the specific requirements of the Annex 6 of the EC GMP Guide into the parts of the main text that are relevant to medicinal gas manufacture. Where the requirements of the EC Guide have no relevance to the manufacture of medicinal gases, these requirements have been omitted from the EIGA GMP Guide. Hence, this EIGA GMP Guide may be used by all medicinal gas manufacturers to assist them in the preparation of a quality management system to ensure that all medicinal gases are manufactured to a defined product specification. This EIGA GMP Guide mainly addresses the quality requirements for the manufacture, storage and distribution of medicinal gases. These activities shall also comply with all of the other appropriate operational, safety and environmental requirements detailed within EIGA publications and any relevant national / international legislation and regulations. This version of the EIGA GMP guide covers the: EU Guidance on GMP Part I: Basic Requirements for Medicinal Products of Annex 6 Manufacturing of Medicinal Gases of July 2010 It does not specifically cover any International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use guidelines. (ICH) 1 References are shown by bracketed numbers and are listed in order of appearance in the reference section. 1

6 2 Scope and purpose 2.1 Scope This EIGA GMP guide is intended for use by all manufacturers of medicinal gases and fillers of medicinal gas cylinders. It covers the: manufacture and storage of all medicinal gases on licensed gas company premises; filling of medicinal gas cylinders; and distribution of bulk medicinal gases and medicinal gas cylinders. It specifies the requirements necessary to meet the specifications set in the relevant Pharmacopoeia standards and, where required by the national authorities, in the relevant marketing authorisations. Where medicinal gases are covered by a marketing authorisation, issued by a national authority, the requirements detailed in this guide may be replaced with specific requirements detailed in those marketing authorisation. This guide does not cover manufacturing and handling of medicinal gases in hospitals, which will be subject to national legislation. However relevant parts of this guide may be used as a basis for such activities. The contents of this EIGA guide covers only the requirements set out in the chapters 1 to 9 of Part I of the EC GMP guide and in Annex 6, covering the manufacture of medicinal gases. It currently does not cover the specific requirements detailed in: Annex 15, Qualification and validation; Annex 16, Certification by a qualified person and batch release; Annex 17, Parametric release; GMP Part II, Basic requirements for active substances used as starting material; and GMP Part III, Site master file. Certain aspects of the above requirements are covered in the EIGA GMP guide where they have been referred to in the text of the main EC GMP guide. This guide provides the minimum standards that are required to meet the requirements of the EC Directive 2001/83 [1]. Although the terminology of the EIGA Guide refers to activities that 'shall' be carried out, it may be appropriate to utilise alternative procedures provided that: It can be demonstrated by risk assessment that the alternative method provides at least the same level of protection to ensure that the quality of the final product is maintained. Any risk assessment is formally documented. Appropriate approval is obtained from the national authorities to deviate from the requirements of the EC GMP guide. Certain national authorities define some of the medical gases that do not fall strictly under the definition of a medicinal product, as medical device gases. These gases, normally used in conjunction with medical devices, do not strictly fall under the control of the EC GMP guide, but for the purposes of this publication can be considered in the same way as for other medicinal gases. Within the text, any 2

7 reference to the manufacture, filling, storage or distribution of medicinal gases shall apply equally to any medical device gases. 2.2 Purpose The purpose of this publication is to provide manufacturers and importers of medicinal gases and fillers of medicinal gas cylinders with a comprehensive guide for the development of a quality management system (QMS) to control their relevant manufacturing processes to meet the GMP requirements. Other requirements for management systems, such as ISO 9001, and may also be used as a guide during pharmaceutical inspections by the national authorities. 3 Definitions There following terms have the specific meanings detailed below when used in the context of the EIGA GMP guide. Shall / must Should / may Good Manufacturing Practice Medicinal gas Medical device gas Marketing authorisation Indicates a requirement that is mandatory that is either prescribed by the legislation or is considered to be the best operating practice by the medicinal gas industry. Indicates a requirement which is preferred method of achieving a requirement but may be substituted by an alternative method provided that this method achieves the same requirement to at least the same standard. Is that part of quality assurance which ensures that medicinal gases are consistently produced and controlled to the quality standards appropriate to their intended use and as required by the marketing authorisation or product specification. Gas used for treating or preventing disease in human beings or administered to human beings with a view to making a medical diagnosis or to restoring, correcting or modifying physiological functions through pharmacological effect. Gas classified as a Medical Device according to Directive 93/42/CE as a substance used alone or in combination intended by its manufacturer to be used specifically for diagnostic and/or therapeutic purposes and necessary for its proper application, intended by the manufacturer to be used for human beings for the purpose of : diagnosis, prevention, monitoring, treatment or alleviation of disease, diagnosis, monitoring, treatment, alleviation of or compensation for an injury or handicap, investigation, replacement or modification of the anatomy or of a physiological process, control of conception. An authorisation issued by the national authority to permit a medicinal gas to be marketed within their territory, as described by Article 6 of EC Directive 2001/83EC [1]. The marketing authorisation details include the specification of the medicinal gas, the method and sites of manufacture, the method of supply, including specification of the cylinder or container and the valve closure, clinical indication and contra-indications and precautions for use. Currently, not all national authorities require a marketing 3

8 authorisation for all medicinal gases to allow them to be marketed within their territory. Manufacturing authorisation Qualified person Test Pharmacopoeia monograph Manufacturing site Bulk medicinal gas An authorisation issued by the national authority to permit the manufacture of specified medicinal gases on specific sites as described by Article 40 of EC Directive 2001/83EC [1]. The manufacturing authorisation specifies the medicinal gases that may be manufactured and filled into cylinders on specific sites, the names of the responsible persons on each site and the name of the Qualified Person, where required by the national authority. Nominated person responsible for the final certification of all medicinal gases prior to supply to the patient, as described by Article 48 of EC Directive 2001/83EC [1]. The qualifications required by the qualified person are described in Article 49 of EC Directive 2001/83EC [1]. Unless otherwise stated, the term test refers to either the sampling and analysis of the medicinal gas at various stages in the process of manufacture or cylinder filling or to the process of validating that the specification of the finished conforms to the requirements of the marketing authorisation or product specification. Refers to the specification and test methods for specific medicinal gases prepared and issued by the European Pharmacopoeia. Refers to any site, covered by a manufacturing authorisation, where medicinal gas cylinders are filled. Gas supplied directly to the end user or to a medicinal gas cylinder filling site, where it has to be further processed before it can be used by the patient. 4 Quality Management (EC GMP Chapter 1) 4.1 Principle Any manufacturer of medicinal gases or filler of medicinal gas cylinders, holding an appropriate Manufacturing Authorisation, shall ensure that the medicinal gases they produce are: fit for their intended use by the patient; compliant with the requirements of their marketing authorisation, where required; and safe, of an appropriate defined quality and efficacious so that they do not place patients at risk. The attainment of this quality objective is the responsibility of the senior management and requires the participation and commitment of staff in many different departments, at all levels within the company, and by the company s suppliers and distributors. To achieve the quality objective reliably there shall be a comprehensively designed and correctly implemented quality assurance system, incorporating the principles of Good Manufacturing Practice and quality control. (Note: the ICH Q10 refers to Pharmaceutical Quality System [4]). The quality assurance system shall be fully documented and have its effectiveness monitored on a regular basis. All parts of the quality assurance system shall be adequately resourced with competent personnel, and suitable and sufficient premises, equipment and facilities. In addition, where required by the national authority, all medicinal gases shall be formally released for patient use by the Qualified Person. 4

9 EC Directive 2001/83 [1] specifies the specific legal responsibilities for both the holder of the Manufacturing Authorisation and the qualified person. The basic concepts of quality assurance, Good Manufacturing Practice and quality control are interrelated. They are described here in order to emphasise their relationships and their fundamental importance to the production and control of the manufacture of medicinal gases and the filling of medicinal gas cylinders. 4.2 Quality assurance (QA) Quality assurance is a wide ranging concept which covers all matters which individually or collectively influences the quality of the medicinal gas. It is the total of the organised arrangements made with the object of ensuring that medicinal gases are of the quality required for their intended use. Quality assurance therefore incorporates the principles of Good Manufacturing Practice as well as other factors outside the scope of this EIGA GMP Guide. The system of quality assurance appropriate for the production of medicinal gases and the filling of medicinal gas cylinders shall ensure that: The equipment and procedures used for the production of medicinal gases and the filling of medicinal gas cylinders are designed and developed in a way that takes account of the requirements of Good Manufacturing Practice. Production and quality control operations are clearly specified and the principles of Good Manufacturing Practice and Good Laboratory Practice adopted. Managerial responsibilities are clearly specified. All necessary controls on starting and packaging materials, intermediate products, and any other in-process controls and validations are carried out. The bulk medicinal gases and the filled medicinal gas cylinders are correctly processed and checked, according to the defined standard operating procedures and individual work instructions. Where the national regulations specify, medicinal gases are not sold or supplied before a qualified person has certified that each production batch has been produced and controlled in accordance with the specifications of the marketing authorisation and any other regulations relevant to the production, quality control and release of medicinal gases. Satisfactory arrangements exist to ensure, as far as possible, that the medicinal gases are stored, distributed and subsequently handled so that safety and quality of the gas and the condition of the containers are maintained throughout their shelf life. There is a procedure for self-inspection and quality audit which regularly appraises the effectiveness and applicability of the quality assurance systems 4.3 Good Manufacturing Practice (GMP) for medicinal gases Good Manufacturing Practice is that part of quality assurance which ensures that medicinal gases are consistently produced and controlled to the quality standards appropriate to their intended use and as required by the marketing authorisation or product specification. Good Manufacturing Practice is concerned with the quality control of the production, filling and distribution of medicinal gases. The basic requirements of Good Manufacturing Practice are that: 5

10 All manufacturing processes are clearly defined, systematically reviewed in the light of experience and shown to be capable of consistently manufacturing or filling medicinal gases to the required quality so that they comply with their specifications. Critical steps of the manufacturing processes and any significant changes to the process are validated All necessary facilities for Good Manufacturing Practice are provided including: appropriately qualified and trained personnel; adequate premises and space to carry out all operations; suitable equipment and services; correct materials, containers and labels; approved standard operating procedures and work instructions; and Suitable finished product storage and methods of distribution. Work instructions and standard operating procedures are written in an instructional form in clear and unambiguous language, applicable to the facilities provided. Operators are trained to carry out procedures correctly and their competency assessed against a documented programme. Records are made, manually or electronically during manufacture of the medicinal gases and the filling of medicinal gas cylinders. These records shall demonstrate that all the required steps, defined by the standard operating procedures and work instructions, have been taken and that the quantity and quality of the medicinal gas is as defined. Any significant deviations from these requirements are fully recorded and investigated. Records of the manufacture and distribution of the medicinal gases provide the complete history of the batch and are retained in a comprehensible and accessible form. These records shall be comprehensive enough to allow the batch to be traced in the event of a product recall. The method of storage and distribution of the medicinal gases minimises any risk to their quality. A system is available to recall any batch of product, from sale or supply. Complaints about marketed products are examined, causes of quality defects investigated and appropriate measures taken in respect of the defective products to prevent reoccurrence. 4.4 Quality control (QC) Quality control is that part of Good Manufacturing Practice which is concerned with sampling, testing and specifications of medicinal gases. It is also concerned with the organisation, documentation and release procedures which ensure that the necessary and relevant tests are actually carried out and that medicinal gases are not released for patient use until their quality has been judged satisfactory. 6

11 The basic requirements of quality control are that: Adequate facilities, trained personnel and approved procedures are available for the sampling, inspecting and testing of starting materials, packaging materials, bulk medicinal gases and filled medicinal gas cylinders for Good Manufacturing Practice purposes. Samples of starting and packaging materials, bulk products and filled cylinders are taken by personnel and the test methods approved by the quality controller. Test methods are validated. Records are made, manually or electronically by recording instruments, to demonstrate that all the required sampling, inspecting and testing procedures are carried out. Any deviations are fully recorded and investigated. The bulk medicinal gases and the filled medicinal gas cylinders comply with the qualitative and quantitative specification of the finished product and are correctly labelled. Records are made of the results of inspection and testing of starting materials, bulk medicinal gases and filled medicinal gas cylinders. These records shall be formally assessed against the specification by the relevant quality controller. Product assessment shall include a review of the relevant medicinal gas production and filling documentation and a review of any significant deviations from the specified procedures. Each batch of bulk medicinal gas or medicinal gas cylinders is released for patient use and certified by the qualified person, where required by the national authorities, prior to supply, confirming that it is in accordance with the requirements of the marketing authorisation and the product specification. 4.5 Product quality review Regular periodic or rolling quality reviews of the authorised medicinal products, including export only products are to be conducted with the objective of verifying the consistency of the existing process, the appropriateness of current specifications for both starting materials and finished product, to highlight any trends and to identify product and process improvements. 4.6 Quality risk management Quality risk management is a systematic process for the assessment, control, communication and review of risks to the quality of the medicinal product. It can be applied both proactively and retrospectively. 5 Personnel (EC GMP Chapter 2) 5.1 Principle The establishment and maintenance of a satisfactory system of quality assurance for the correct production of medicinal gases and filling of medicinal gas cylinders relies upon people. For this reason there shall be sufficient qualified and trained personnel to carry out all the tasks involved in the production of medicinal gases and the filling of medicinal gas cylinders. Records shall be maintained to demonstrate that individuals clearly understand their specific responsibilities. All personnel involved in the manufacture and assembly of medicinal gases shall receive initial and continuing training relevant to their needs and responsibilities. Specifically they shall be trained and assessed in their awareness of Good Manufacturing Practice and be made aware of the critically important aspects of their roles and the potential hazards for patients from the medicinal gases should they not follow the specified procedures. 7

12 5.2 General Personnel requirements The manufacturer of medicinal gases and the filler of medicinal gas cylinders shall have an adequate number of personnel with the necessary qualifications and practical experience available to carry out all operations. The responsibilities placed on any one individual shall not be so extensive as to present any risk to quality of the gas supplied for patient use Organisation chart Manufacturers of medicinal gases and fillers of medicinal gas cylinders shall have an organisation chart detailing the reporting structures throughout the organisation. All personnel in responsible positions shall have their specific duties recorded in their written job descriptions and adequate authority to carry out their responsibilities. These duties may be delegated to designated deputies of a satisfactory qualification level. There shall be no gaps or unexplained overlaps in the responsibilities of those personnel concerned with the application and control of GMP. 5.3 Key personnel Responsibilities The holder of a manufacturing authorisation shall have available on every manufacturing site a nominate person: responsible for production; and responsible for quality control. Normally these key posts should be occupied by full time personnel. If these persons are not resident on the site they shall still retain the overall responsibilities for production and/or quality control. The heads of production and quality control shall be independent from each other. In large organisations, it could be necessary for the nominated head of production or quality control to delegate some of their responsibilities to another suitably qualified person. The manufacturing authorisation holder shall have permanently and continuously at their disposal a qualified person, who shall be responsible for the final release of all bulk medicinal gases or filled medicinal cylinders prior to the supply to the patient. The duties of the qualified person are fully described in EC Directive 2001/83 EC [1] Independence The level of independence of quality control to production is considered fundamental to the satisfactory operation of quality control. The quality controller shall have the authority to prevent any finished medicinal gases that do not meet the specification from being supplied for patient use Person responsible for production The person responsible for production is generally responsible for: ensuring that the manufacture of medicinal gases and the filling of medicinal gas cylinders follows the authorised procedures detailed on the marketing authorisation, where required, in order to obtain the specified quality; checking that the maintenance of the equipment and premises under his control are carried out correctly; 8

13 ensuring that the appropriate process validations are completed; ensuring that the required initial and continuing training of his department personnel is carried out and adapted according to the identified need; and ensuring that any agreed self-inspection programme is completed and that the appropriate actions are taken to correct any identified non-compliances Person responsible for quality control The head of the quality control department is generally responsible for: approving or rejecting, as they see fit, starting materials, packaging materials, and intermediate bulk and finished product; evaluating batch records; ensuring that all necessary testing is carried out. approving specifications, sampling instructions, test methods and other QC procedures; approving and monitoring any contract analysis. checking the maintenance of their department, premises and equipment; ensuring that the appropriate quality control validations are completed; and ensuring that the required initial and continuing training of their department personnel is carried out and adapted according to need Joint responsibilities The persons responsible for production and quality control generally have some shared or jointly exercised responsibilities relating to the quality of the medicinal gases. These responsibilities can include: authorisation of written procedures and other documents, including amendments; validation of procedures; training; designation and monitoring of storage and distribution conditions for materials and products; retention of records; monitoring of compliance with the requirements of GMP; and control of any changes to procedures or equipment, including any relevant validations. 9

14 5.3.6 The qualified person Where required by the national authorities, the qualified person's responsibilities shall include: Ensuring that each batch of bulk medicinal gas or filled medicinal gas cylinders has been produced and tested /checked in accordance with the relevant directives and the appropriate marketing authorisation. Certifying in a register or equivalent document, as operations are carried out and before any release, that each production batch satisfies the provisions of the EC Directive 2001/83 EC [1]. Approving specifications, sampling instructions, test methods and any other quality control procedures Verifying that the appropriate validations are completed. Verifying that the required initial and continuing training of their department personnel is carried out and adapted according to the identified need. Approving and monitoring of suppliers and materials. Approving and monitoring of contract manufacturers. Making the decision to recall potentially defective finished product and to assist, as necessary, in the investigation procedure and any follow-up actions when informed of any product non-conformance The person responsible for the qualified person duties shall meet the qualification requirements laid down in EC Directive 2001/83 EC [1] and shall be permanently and continuously at the disposal of the holder of the manufacturing authorisation to carry out these responsibilities. The qualified person's responsibilities may be delegated to another qualified person with the appropriate experience. The qualified person responsible for release of medicinal gases shall have a thorough knowledge of the production and control of medicinal gases. 5.4 Training Manufacturers of medicinal gases and fillers of medicinal gas cylinders shall provide training for all the personnel whose duties take them into production areas or laboratories (including the technical, maintenance and cleaning personnel), and for other personnel whose activities could affect the quality of the product. Besides the basic training on the theory and practice of GMP relevant to the manufacture of medicinal gases, newly recruited personnel shall receive training appropriate to the duties assigned to them. Continuing training shall also be given, and its practical effectiveness shall be periodically assessed. Training programmes for all personnel and consultants shall be available, approved by either the head of production or the head of quality control, as appropriate. Training records shall be retained Hazard areas Personnel working in areas where contamination is a hazard or areas where toxic materials are handled shall be given specific training. 10

15 5.4.2 Visitors Visitors or untrained personnel should not be taken into the production and quality control areas. If this is unavoidable, they should be closely supervised and given the appropriate information in advance, particularly about personal hygiene and the prescribed protective clothing Quality assurance training The concept of quality assurance and all the measures capable of improving its understanding and implementation shall be fully discussed as part of the overall training programme during training sessions. 5.5 Protective clothing For safety reasons every person entering the manufacturing areas shall wear protective garments appropriate to the operations to be carried out. Personnel shall be instructed to use gloves when handling medicinal gas cylinder valves. 5.6 Personal hygiene Separate facilities shall be provided for personnel for eating, drinking or smoking remote from any production and quality control areas. These facilities should include storage for food and drink or any smoking materials. In general, any unhygienic practice within the manufacturing areas or in any other area where the product might be adversely affected shall be forbidden. 6 Premises and equipment (EC GMP Guide Chapter 3) 6.1 Principle Premises and equipment for manufacture of medicinal gases and the filling of medicinal cylinders shall be located, designed, constructed, adapted and maintained to suit all of the relevant operations. The layout and design of the premises shall aim to minimise the risk of errors and permit effective cleaning and maintenance of the equipment and not have any adverse effect on the quality of products. The manufacture of medicinal gases and the filling of medicinal gas cylinders is carried out in closed pipework, containers and tanks. Consequently, environmental contamination of the product is minimal, provided that the equipment is suitably commissioned and maintained in an operational condition. However there could be a risk of cross-contamination with other gases if the pipework allows for interconnections between different gases without any suitable backflow protection and the appropriate, validated procedures are not followed correctly. 6.2 Premises Premises shall provide sufficient space for manufacturing, filling, testing, inspection and storage of medicinal gases to avoid the risk of mix-up. Premises shall be kept clean and tidy to encourage orderly working and have adequate space to permit the storage of cylinders to be correctly laid out with adequate segregation Maintenance Premises and equipment shall be cleaned and maintained regularly to a documented preventative maintenance programme. The repair and maintenance operations shall ensure that they do not present any hazard to the quality of the medicinal gas, and be carried out according to detailed written procedures. 11

16 6.2.2 Unauthorised entry Steps shall be taken to prevent the entry of unauthorised people to production, cylinder filling, storage and quality control areas, which shall not be used as a right of way by personnel who do not work in them. 6.3 Manufacturing areas - Production Location Except where special precautions are taken, production equipment shall be located away from any incompatible activities such as those that generate any chemical or biological emissions Storage areas Where starting materials are stored prior to use, they shall be kept in an environment where contamination is avoided and deterioration is controlled. 6.4 Manufacturing areas - Cylinder filling Layout Premises used for the filling of medicinal gas cylinders should preferably be laid out in such a manner as to allow a flow through the area, with cylinder filling steps taking place in areas connected in a logical order corresponding to the sequence of the cylinder filling operations. Cylinder filling areas shall be of a sufficient size and have an orderly layout, providing separately marked areas for different gases and, where applicable, different cylinder sizes. A typical plant layout is shown in Figure 1, 12

17 6.4.2 Segregated areas Medicinal gases should preferably be filled in a separate area from non-medicinal gases and there should be no exchange of cylinders between these areas. In exceptional cases, the principal of campaign filling in the same area can be accepted provided that specific precautions are taken and necessary validation is done to ensure that there is no confusion between medicinal and non-medicinal gas cylinders. 13

18 6.4.3 Inspection and testing areas Facilities for the inspection, testing and maintenance of medicinal gases cylinders shall be specifically designed and laid out so as to avoid mix-ups or contamination of the cylinders Lighting Cylinder filling areas shall be well lit, particularly where cylinders are inspected to ensure they are suitable for filling and where visual, on-line controls are used In-process controls In-process controls may be carried out within the production and filling areas provided they do not present any risks to the production of medicinal gases and the filling of medicinal gas cylinders Storage areas - Cylinder filling Storage areas for medicinal gas cylinders shall be of a sufficient size and capacity to allow for orderly storage and to permit clearly identifiable segregation areas of the different gases filled on site and to differentiate the status of the stored cylinders. The method used to achieve the various levels of segregation will depend on the nature, extent and complexity of the overall operation. Marked out floor areas, partitions, barriers, labels, signs or other appropriate means could be used to identify storage areas Layout Cylinder storage areas shall be clearly identified and provide suitable segregation to allow distinction between the various stages reached by given cylinders, including: empty cylinder storage area where cylinders returned from customers can be stored prior to cylinder sorting; empty cylinder sorting area where cylinders can be segregated into those suitable for refilling and those requiring either statutory testing or rectification prior to refilling; empty cylinder storage area for cylinders suitable for refilling; quarantine area for filled cylinders awaiting quality control and formal release; full cylinder storage area for released cylinders; and rejected non-conforming cylinders Storage area protection Sorted empty cylinders and full cylinders shall be stored in nominated storage areas, preferably under cover and not subjected to extremes of weather conditions and ambient temperature. Storage areas shall be kept clean, dry, well ventilated and free of combustible materials to ensure that cylinders remain in an appropriate condition compatible with the environment in which they will be used, up to the time of supply Stock rotation In order to permit batch segregation, medicinal gas cylinder shall be stored in an orderly fashion with adequate segregation of different gases and of full/empty cylinders. 14

19 The storage arrangements shall permit suitable rotation of stock to ensure that cylinders are used for supply to customers on a first in / first out basis Reject cylinder storage Segregated labelled areas shall be provided for the storage of complaint and reject cylinders Label storage Cylinder labels and package inserts (patient information leaflets) are considered critical to the conformity of the medicinal gas product and special attention shall be paid to the safe and secure storage of these materials Storage protection Full gas cylinders shall be suitably protected from adverse weather conditions during storage. and transportation. For gas mixtures where phase separation can occur, the storage and transportation arrangements shall be as defined in the marketing authorisation 6.5 Quality control areas The layout of the medicinal gas quality control areas shall have sufficient space for cylinder storage to avoid mix-ups or cross-contamination of sample cylinders. There shall be adequate suitable storage space for all medicinal gas sample cylinders and for the associated records Environmentally controlled areas Laboratories for the testing of medicinal gases are only required where the analytical equipment needs to be maintained in a controlled environment Area segregation Finished product analysis areas should preferably be separated from production areas, unless the analysis equipment is installed adjacent to the medicinal cylinder filling point. 6.6 Ancillary areas Rest areas Rest and refreshment rooms shall be separate from production, cylinder filling, quality control and storage areas Toilet areas Washing and toilet areas, as well as facilities for changing clothes shall be easily accessible and designed for the appropriate number of users. These toilet facilities shall not have direct access with production, cylinder filling, quality control or storage areas Maintenance areas As far as practicably possible, maintenance workshops should be separate from production and cylinder filling areas. Whenever parts and tools are stored in the production area, they should be kept in rooms or lockers reserved for that use. 6.7 Equipment All equipment for the manufacture, cylinder filling and analysis of medicinal gases shall be designed, qualified, calibrated and maintained to suit its intended purpose. 15

20 6.7.1 Maintenance and cleaning Repair and maintenance operations shall not adversely affect the quality of medicinal gases produced or filled into cylinders. The design of manufacturing and cylinder filling equipment should be designed to permit easy and effective cleaning and evacuation to remove any internal contamination. Where the pipework or equipment requires specific cleaning, the system shall be designed so that any residual cleaning material can be easily removed prior to use. Detailed written procedures shall be available to cover the appropriate methods of purging and cleaning all equipment and putting the system back into operation. The manufacturing and cylinder filling equipment systems shall be designed so as to minimise the release any particulate matter into the finished product Material selection Manufacturing and cylinder filling equipment shall not present any hazard to the finished products. The parts of the equipment that come into contact with the product shall not be reactive, additive or absorptive to such an extent that it will affect the quality of the medicinal products and thus present a hazard. This specifically includes the use of halogenated materials for oxygen at high pressure that could produce toxic gases if they should ignite, such as under adiabatic compression conditions Calibration Critical instruments used for measuring, weighing, recording and controlling equipment shall have specific calibration periods using appropriate validated methods. All critical instruments shall be calibrated and checked at the prescribed intervals. Detailed records of all of the calibration tests, including the 'as found' and the 'post calibration' values shall be maintained Defective equipment Defective equipment shall be clearly labelled as defective and, if possible, be removed as soon as possible from the manufacturing, production or laboratory areas. 6.8 Equipment - Bulk production Plant segregation It is acceptable to manufacture non-medicinal gases and medicinal gases concurrently, such as in an air separation unit (ASU), provided that the quality of the non-medicinal gas is at least equal to the quality of the medicinal gas Air filtration In an ASU, where atmospheric air is used as a raw material, it shall be filtered at the inlet point to restrict the intake of particulate matter into the plant. 6.9 Equipment - Medicinal cylinder filling Cylinder filling manifolds The medicinal gas cylinder filling manifolds shall be dedicated to the filling of either a single medicinal gas or to a given mixture of medicinal gases to different concentrations. 16

21 It is necessary to ensure that the correct gas is put into the correct container. The manifolds shall be equipped with filling hose connectors that correspond only to the valve outlet for that particular gas or mixture of gases so that only the correct containers can be attached to the manifold without the use of an adapter. The use of specific cylinder and container valve connections could be subject to international or national standards. Where the same medicinal gas cylinder valve outlet is used for more than one medicinal gas, additional precautions shall be taken to ensure that the correct gas is filled into the correct cylinder. The name of the gas or gas mixture being filled shall be displayed on each medicinal gas cylinder filling manifold. An exception to this rule is described in Medicinal cylinders Cylinders in medicinal gas service shall be dedicated to that service and have the appropriate technical characteristics, according to international or national regulations. Cylinders shall be labelled and painted correctly, according to the national standards and to comply with the relevant marketing authorisation, where applicable Shared filling systems Filling of medicinal gas cylinders shall be avoided in non-medicinal gas cylinders filling areas.and not filled with equipment used for filling non medicinal gas cylinders. In exceptional circumstances, where it is impracticable to have a dedicated medicinal gas cylinder filling facility, and where the national regulations permit, the principle of campaign filling may be used to allow medicinal gas cylinders to be filled on non-medicinal gas cylinder filling equipment. In these circumstances, the area shall be dedicated to medicinal gas cylinder filling during the campaign and appropriate tests and procedures carried out to ensure that the product is not contaminated with nonmedicinal gas and the cylinders filled comply with the relevant specifications. GMP standards shall be maintained during the campaign filling process. Ideally, filling lines used to supply medicinal gas filling areas should be dedicated to that service. However, where it is necessary to have a shared facility serving both products, there shall be a validated method of backflow prevention in any line supplying the filling area for non-medicinal gases to prevent contamination of the medicinal gas from the possible impurities that may be returned in the nonmedicinal gas cylinders Pipeline interconnections Except for validated automated filling processes there shall be no direct interconnections between pipelines carrying different gases other than for medical gas mixture filling systems Non-automated filling systems Where an automated filling process is not available for the filling of medicinal gas mixtures, there shall be a documented procedure to demonstrate that the mixtures have been filled correctly and consistently and that there has been no backflow from any other cylinder filling process Equipment - Bulk storage and transport Storage tanks Storage tanks and mobile delivery tankers shall be dedicated to one gas. The quality of the gas stored in the storage tank or mobile delivery tanker shall be well defined and shall be at least equal to the medicinal gas quality standard. The storage tank and delivery tanker shall have product specific 17

22 couplings for the transfer of product to another storage tank or tanker to prevent the wrong gas from being transferred into the tank Common storage tanks Bulk medicinal gases from the manufacturing plant may be stored in the same batch or bulk storage tank as non-medicinal gases, provided that, if permitted by local regulations, the quality of the nonmedicinal gas is at least equal to the quality of the medicinal gases Common delivery vehicles If permitted by local regulations, cryogenic liquefied medicinal gases may be transported in the same tankers as non-medicinal gases. This may only be permitted provided that the quality of the nonmedicinal gas is at least equal to the quality of the medicinal gas. There shall also be a validated backflow protection device fitted to prevent back feeding of non-medicinal product from the customer's storage tank into the tanker when product is being transferred. Where tankers are used for delivering medicinal liquefiable gases also to non-medical customers, where a two hose filling system is used to balance the pressure between the tanker and the storage tank, then either: The deliveries of medicinal gases shall be made before any non-medicinal deliveries are made, to ensure that there is no cross contamination between medicinal and non-medicinal customer storage tanks The assay of the gas being delivered to a medicinal customer is monitored prior to the tanker off loading any product. The testing procedure needs to consider the likely contaminants that could be present to confirm that there has been no degradation of the product. With this type of delivery system, there shall be a procedure in place to assess the likely contaminants from the non-medicinal customers and procedures put in place to ensure that the tanker has not been contaminated with any likely contaminants prior to the tanker being refilled for medical deliveries. 7 Documentation (EC GMP Chapter 4) 7.1 Principles Good documentation is an essential part of any quality assurance system used for the production of bulk medicinal gases and the filling of medicinal gas cylinders. Clearly written documentation prevents errors and permits the tracing of batch history. Specifications, standard operating procedures, work instructions, and records shall be controlled and available to all of the relevant personnel either in written or electronic format. All written documents shall be legible and free from errors. 7.2 General Starting materials All starting materials involved in both the production of bulk medicinal gases and the filling of medicinal gas cylinders shall be specified to the appropriate standards, as detailed in the relevant marketing authorisation or any other relevant legislation. As well as any bulk starting materials, the specifications shall include, as required, the details of cylinders, cryogenic containers, valves, labels and leaflets used in the supply of the medicinal gases. These specifications shall serve as the basis for all quality evaluations in the quality control system used to control any starting materials. 18